USART INTERFACE

USART's are used for generic serial communication between AVR32 processors and peripherals.

Three USARTs are available on product. The USART1 is connected to external DB9 connectors.

Peripherals and connectors

Signals

Signal DescriptionPeripheral and connectorsAvailable on GPIO
U1_RXReceive serial data(1),(5) PA 24
U1_TXTransmit serial data(1),(5) PA 23
U1_CTSClear to send(1),(5) PB 4
U1_RTSRequest to send(1),(5) PB 5